Apparatus for drying raw or prepared goods



(No Model.) 3 Sheets-Sheen 1.

A. RUBENKAMP. APPARATUS FOR DRYING RAW 0R PREPAREDGOODS.

No. 528,807. I Patented Nov. 6,1894.-

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3 D M A K N E U R A APPARATUS FOR DRYING RAW 0R PREPARED GOODS.

No. 528,807, Patented Nov. 6, 1894.

INVENTOI? J25! er M 6 ATTORNEYS.

WITNESSES: Y a 1 L- MW (No Model.) 3 Sheets-Sheet 3.

No. 528,807. Patented Nov. 6, 1894.

I f lli WITNESSES: INVENTOR A TTORNEYS.

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Mrs TATES AUGUST Rl lBENKAMP, OF DORTMUND, GERMANY.

APPARATUS FOR DRYING RAW OR PREPARED GOODS.

SPECIFICATION forming part of Letters Patent No. 528,807, dated November 6, 1894.

Application fil d August 16,1892. Serial No. 443,223. (No model.) Patented in Switzerland February 28, 1892,11'0. 6,414

in England May 26, 1892,1To. 9,992; inlirance June 2,1892,N0-222,089; inBelgiumAugust 1, 1892,110- 100,780; in Denmark August 4, 1892. and in Austria-Hungary August 26, 1893, N0. 544 and No. 9,557.

To all whom it may concern.-

Be it known that I, AUGUST RI'JBENKAMP, engineer, of Dortmund, in the Kingdom of Prussia, German Empire, have invented a new and useful Apparatus for Drying Raw or Prepared Goods, (for which Letters Patent have been granted to me in France, No. 222,089, dated June 2, 1892; in England, No. 9,992, dated May 26, 1892 5 in Austria-Hungary,No. 544 and No. 9,557, dated August 26, 1893; in Belgium, No. 100,780, dated August 1, 1892 in Switzerland, No. 5,414, dated February .28, 1892, and in Denmark, dated August 4, 1892,) of which the following is a specification, reference being had therein to the accompanying drawings. 7 g

The objects of this invention are first, to avoid the great loss of heat, arising when the products of combustion and the hot drying air are allowed to escape directly into the atmosphere, and, secondly, to allow of a gradual warming and cooling. of the goods under treatment.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figures 1, 2 and 3 are views of three connected apparatuses, Fig. 1 showing one such in vertical section on the line 91O of Fig.7, Fig. 2 showing the second of the connected apparatuses on the line 1l12 of Fig. 7, and Fig. 3 showing the third apparatus in front elevation. Figs. 4, 5 and 6, are horizontal sections through such apparatuses, Fig. 4 showing one such on aline corresponding to line 12, Fig. 7, Fig. 5 showing the second on a line corresponding to line 34, Fig. 7, and Fig. 6 showing the third one on a line corresponding to line 5-6, Fig. 7. Fig. 7 is a vertical longitudinal section on the line 13-15,

- Fig. 4. Fig. 8 is a sectional plan view, the

right side of the center line being taken through the drying chambers, as indicated by line 5-6, Fig.9, and the left side of the center is taken on the line 1, 2, 3, 4. In this figureflthe lower part -.of the apparatus is omitted from the right;of the figure in the interest of clearness. Fig. 9 is a'longitudinal central vertical section through the ap- 5o paratus, as indicated by line 7, 8, 9, 10, Fig. 8. The heated air which serves to dry the goods, is after passing through the drying chamber, brought back to the closed furnace, where it serves to effect combustion of the fuel. The products of combustion, and the air which passes through the drying chamber and the various tubes and channels for the purpose of heating the apparatus, instead of being conducted directly to the chimney, may be first passed through the heating tubes and channels of a second apparatus in order to bring the same into a state ready for the commencement of the drying process. 1

Referring especially to Figs. 1 to 6, each drying chamber c has its separate furnace a, towhich fuel may be supplied through open ings at the top provided with covers 1). Leading from each furnace at at the back of its bridge a, are serpentine channels cl, (1' below the floors e of the drying chambers e, the products of combustion being divided by the partition 0' back of thebridge wall 0. The portions d of such serpentine channels lead in a downward and rearward direction as at 01 to a point beneath conduits h, h which extend longitudinally at the rear of the apparatus, communication between the outlets d of the serpentine channels and either the conduits h it being established by means of valves g, 9 which are operated by the valve rods 9 (Fig. 7.) The conduits h lead to a chimney g (indicatedby dotted lines in Fig. 7) or other exhaust, while the conduits 72 may be made to communicate with the portions d of the serpentine channels cl, (1', by means of dampers n.

In each furnace a, air pipes or tubes tare fitted, and are open at their front ends for the admission of atmospheric air, their inner ends opening into the drying chamber'e to deliver air thereto. From the rear of each chamber e outlet pipes is lead to a vertical pipe I connected with the pipe Z, which is extended forwardly on the top of the furnace, and is connected at the front with the downwardly extended pipes m, which latter in turn deliver to the furnace at, such furnace being otherwise closed. The pipes Z of the several drying chambers e are united by connecting pipes 0. (Figs. 5 and 7.)

Each dryingchamber e is provided with doorsf, through which the goods to be dried are inserted and removed. When using only one chamber 6, the operation is as follows: The hot gases from the furnace a pass over the bridge wall 0, and dividing, pass through the channels cZ,(Z', d beneath the heating chamber 6, and the valve g being opened, the gases pass to the conduit h and to the chimney 9 At the same time, air enters the chamber 6 through pipes z, and, with the moisture driven off from the goods, passes out through outlet pipes 7c, and through pipes 7', Z, and m, to the furnace.

When the three drying chambers are in nse,fire is lighted in the furnace a of the first chamber, and the valve g of the first furnace is closed, and the valve q opened, the dampers n of the second apparatus are opened, together with the valve 9 of such second furnace, while the adjacent valve g is closed. The gases will now, after passing through channels d, d, (1 of such first furnace enter conduit h through first valve g from conduit 72, through the dampers n of the second apparatus into the channels d of the latter, out through valve g of such second apparatus, and thence to conduit h, and to the chimney. This passage of the gases from the first furnace beneath the second heating chamber, givesthe goods in the lattera preliminary heating, and the aqueous vapor from the secondchamber passes from the latter, through the pipes of such second chamber and comminglesin pipes land 0 with the vapor from the first chambere, and passes to the furnace of the-first chamber through the pipes at of the latter. The goods in the first chamber having been sufficiently dried,the fire in the firstfurnace is allowed to die out or is extin guished, and the firein the second furnace is lighted. The valve g of thefirst furnace is closed and the valve g opened, whereby cool air will enter the first chamber, pass through the same, out through pipes 70, Z, m, through the furnace to channels 0!, d, 61 and out through valve g, and conduit h to the chimney, thus cooling the goods, inthe first chamber. At thesame time the valve 9' of the second apparatusis closed and its valve 9 opened, and also the dampers 7?. leading to thethird apparatus-is opened, while thedampers of the sec ond apparatus are closed. Thus, the gases from the second furnace after passing beneath the second drying chamber will pass beneath the third,'in the same'manner as de-' scribed with respect to the first and second.

Referring to Figs. 8 and 9, the apparatus includes a single furnace-A, having fuelopelr ing Byfor heatinga series of drying chambers, six being shown. At the back of the furnace is a longitudinal chamber 19, to which the-hot gases pass over bridgewall c and from the said chamber lead a series of valved outlets g, each of which communicates with a longitudinal channel g beneath the drying chamber 6 the opposite end of which channel q. leads by a passage (1 through valved outlets n to longitudinal conduit 91' at the back of the apparatus. Near the front end of the conduit (1 it has communication, as at cl, with the serpentine channel at ranging beneath the drying chamber 6 the opposite end of such serpentine channel d leading to a passage d, which extends beneath the rear conduit n and a second parallel conduit 01]",

the passage (1 being adapted to communicate with either conduit at or 02, through valves 5 The conduits n, n", correspond with the conduit-s 7L2, h, of the other figures, the conduit 71, leading to chimney o.

In the furnaoe'A, a seriesof air inlet pipes I are fitted, through which atmospheric air enters to a common chamber 8, and in the rear wall of the chamber 8, openings 15 are made into the several drying chambers e the openings being closed by dampers 15 having operating rods t The pipes 7c and Z are the same in all respects as the corresponding pi pes in the other figures, except that they lead to a common forwardly extending pipe 1 which delivers-to thefurnaceby pipes m.

"With this apparatus, the gases enter the chamber 2, and may be directedto thechannels beneath any desired drying chamber-or drying chambers. The gases may be directed beneath one chamber and then to the chimney, or successively through any two or more and then to the chimney. Thus, when the valves g yn of the first chamber are closed, the first valve '9 opened, and-th'e valve g of the second chamber closed and the valves- 21 g of such second chamber opened, thegases will pass through" the serpentine passages d of the first chamber, through the-first valve 9, to conduit'n' through the second valve nflinto the second channels q, d ,andout through the second passage g,andva1ve' g to conduit n and to the chimney. l

Doors f are provided for chambers 6 for the entrance and removal of the'goods.

Having thus described my invention, I claim as new and desire to secure by Letters Patent-- 1.A drying apparatus comprising a series of drying chambers, each having channels beneath the same, a source of heat connected with such channels, two conduits with which the channels are connected,valved outlets from each of th'echannels toboth'conduits, anda controlled inlet from one of' such conduits to the channels, substantially'as described.

y 2. A drying apparatus comprising a series of drying chambershaving each'serpentine channels beneath the same a heat generator delivering its'gases to the said channels, conduits towhich'theserpentine channels lead,

IIO

'bers, and connections between the said outlets valved outlets from the channels to each of the conduits, controlled inlets from one of the conduits to the channels, air inlet pipes to the drying chambers, outlets to the drying chamand the generator, substantially as described.

3. A drying apparatus comprising a series of drying chambers, a furnace, a hot air chamber common to all the drying chambers, air inlet pipes fitted in the furnace and delivering to the hot air chamber, controlled inlets from the hot air chamber to the drying cham- Witnesses OHR. SONNENSCHEIN. A. K LINGHAMMER. 

